Value Collection MP39632 Hex Lock Nut 1-1/4-7 Grade 8

Product Description

The VALUE COLLECTION MP39632 is a 1-1/4-7 UNC hex lock nut with a nylon insert locking mechanism, manufactured from Grade 8 steel with a bright, uncoated finish. The nylon insert creates interference with the mating thread to resist loosening from vibration and torque loads without damaging the fastener thread. At 1-25/64 inches in height and 1-13/16 inches across the flats, this nut is sized for heavy-duty structural and mechanical fastening applications. Right-hand thread direction follows standard UNC conventions. Machinists, millwrights, maintenance mechanics, and general contractors use this fastener in equipment assembly, structural connections, and machinery where reliable prevailing-torque locking is required.

This hex lock nut is suited for industrial, commercial, and heavy equipment applications where Grade 8 steel strength and reliable vibration resistance are required. It is appropriate for use in static and dynamic load environments including machinery frames, structural steel connections, and mechanical assemblies using 1-1/4-7 UNC threaded fasteners. The bright uncoated finish is standard for indoor and protected installations where corrosion exposure is minimal.

Key Features

• Nylon insert locking style provides prevailing-torque resistance without damaging mating threads
• Grade 8 steel construction for high tensile and proof load capacity
• 1-1/4-7 UNC thread size with right-hand thread direction
• Height of 1-25/64 inches and width across flats of 1-13/16 inches for standard hex wrench fitment
• Bright uncoated finish suitable for protected or indoor service environments
• Conforms to inch measurement system under UNC fastener standards

Compatibility

Designed for use with any 1-1/4-7 UNC Grade 8 or compatible threaded bolt or stud in standard inch-system mechanical and structural assemblies.

Installation Notes

Installation is performed by hand and with a standard hex wrench or impact tool sized for a 1-13/16-inch across-flats hex nut. De-energize or lock out any machinery before servicing fastened assemblies per applicable OSHA lockout/tagout procedures. Nylon insert lock nuts are generally considered single-use; replace the nut if the nylon insert shows deformation or if the prevailing torque feel is reduced upon reuse. Do not exceed the rated torque range for Grade 8 fasteners of this thread size.